ILLINOIS · STATEWIDE · FCC DATA

Best cell phone coverage in Illinois Illinois, statewide

Verizon reports the widest coverage in Illinois: 96% of the area outdoors, 12.4 points ahead of T-Mobile. AT&T is close enough behind to call the top two level.

Carrier-reported coverage from FCC carrier filings as of December 31, 2025, not measured signal. How these figures are read

RESULT · ILLINOIS

Coverage in Illinois

What stands out in Illinois

  • In a moving car the order changes in Illinois: AT&T reports 72.1%, Verizon 58.8%.
  • Illinois ranks 3rd of 51 for the most AT&T coverage in a moving car (72.1%).
  • T-Mobile loses the most of Illinois in a moving car: 83.6% outdoors, 44.9% in a car.
  • T-Mobile reports 83.6% of Illinois outdoors, against 47.3% of the US.
★ WIDEST REPORTED COVERAGE
Verizon
96%
Outdoor
96%
In car
58.8%

AT&T vs T-Mobile vs Verizon in Illinois

#1
Verizon
Outdoor
96%
In car
58.8%
#2
AT&T
Outdoor
93%
In car
72.1%
#3
T-Mobile
Outdoor
83.6%
In car
44.9%

4G and 5G across all carriers in Illinois

4G LTE
97.4%
5G 7/1
87%
5G 35/3
76.1%

Check your street on each carrier's map

Verizon coverage map → AT&T coverage map → T-Mobile coverage map →

Where coverage runs thin in Illinois

Counties with the least land under 4G LTE from any carrier: Pope County (79%), Hardin County (87.1%), Gallatin County (91.4%), Schuyler County (92.3%), Alexander County (94%). See how Illinois compares in the 10 US states with the least cell coverage.

Coverage in Illinois's largest cities

States with figures closest to Illinois's